diff --git a/src/main.rs b/src/main.rs
index 852f52e..6a38527 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -9,7 +9,7 @@
 #![feature(trait_alias)]
 #![feature(generic_arg_infer)]
 extern crate alloc;
-use core::mem::{MaybeUninit};
+use core::mem::MaybeUninit;
 
 use alloc::borrow::Cow;
 use alloc::boxed::Box;
@@ -25,9 +25,7 @@ use esp_alloc::EspHeap;
 use esp_backtrace as _;
 use esp_hal::adc::{AdcPin, Attenuation, ADC};
 use esp_hal::clock::CpuClock;
-use esp_hal::gpio::{
-    Analog, AnyPin, GpioPin, Output, PushPull,
-};
+use esp_hal::gpio::{Analog, AnyPin, GpioPin, Output, PushPull};
 use esp_hal::peripherals::{Peripherals, ADC1};
 use esp_hal::systimer::SystemTimer;
 use esp_hal::{adc::AdcConfig, clock::ClockControl};
@@ -192,7 +190,7 @@ async fn battery_monitor(
                 .await
                 .insert(Cow::from("vbat"), v_bat.to_string());
         }
-        Timer::after(Duration::from_secs(1)).await;
+        Timer::after(Duration::from_secs(30)).await;
     }
 }
 static EXECUTOR: StaticCell<Executor> = StaticCell::new();
diff --git a/src/mqtt.rs b/src/mqtt.rs
index 23c31e5..3df090b 100644
--- a/src/mqtt.rs
+++ b/src/mqtt.rs
@@ -107,7 +107,7 @@ pub async fn send_message(
         // establish TCP connection
         socket.connect(socket_addr).await?;
         let after_tcp = Instant::now();
-        info!("connected to {socket_addr:?}");
+        debug!("connected to {socket_addr:?}");
 
         // seed mqtt rng from rng
         let mut mqtt_config = ClientConfig::<5, _>::new(
@@ -153,7 +153,7 @@ pub async fn send_message(
         let mut mqtt_backend = socket;
         let after_tls = Instant::now();
         #[cfg(feature = "tls")]
-        info!(
+        debug!(
             "tls handshake succeeded: +{}ms",
             (after_tls - after_tcp).as_millis()
         );
@@ -174,7 +174,7 @@ pub async fn send_message(
         );
         mqtt_client.connect_to_broker().await?;
         let after_mqtt = Instant::now();
-        info!("connected to broker");
+        debug!("connected to broker");
         for (topic, message) in messages {
             mqtt_client
                 .send_message(